Just over a year before United Healthcare CEO Brian Thompson was murderedthis week in Midtown Manhattan, a lawsuit filed against the insurance giant he helmed revealed just how draconian its claims-denying process had become.Last November, the estates of two former UHC patients filed suit in Minnesotaalleging that the insurer used an AI algorithm to deny and override claims to elderly patients that had been approved by their doctors.The algorithm in question, known as nH Predict, allegedly had a 90 percent error rate — and according to the families of the two deceased men who filed the suit, UHC knew it.